Disk furrow-opener for grain-drills.



w. A, VAN 131111111". DIQK FURROW OBgNER FOE GRAIN DRILLS.APPLIGATIONEFILED FEB. 17, 1911.

1,009,869. Patented Nov. 28, 1911.

avwvm toz altar/nu clog the operation of the disk.

UNITED STATES PATENT (EFFTCE.

WILLABD A. VAN BRUNT, 0F HGRICON, WISCONSIN.

DISK IF'URRO'W-0IENER FOR GRAIN-ID1311115148.

To all whom it may concern:

"Be it known that l, VVILLAnn A. VAN BRUNT, a citizen of the UnitedStatesyra siding at Horicon, in the county of Dodge.

and State of \Visconsin, have invented certam new and usefulImprovements 1n Disk Furrow-Openers for" Grain-Drills, of which thefollowing is a specification.

This inventionrelates to improvements 111 grain drills and particularlyto .furrow opener devices -for grain drills.

, Itis especially adapted for use in territory wherein the conditions ofseeding require that the furrow opening devices shall be adapted toprevent the accumulation of sticky matter such as mud or dirt or stickytrash.

It is illustrated as an improvement on the type of furrow openergenerally known as a the well known type of closed delivery furrowopener the toe scraper extending forwardly and upwardly toward thecenter of the disk. But this improvement relates more particularly tothe proper association of the boot and toe scraper to the convex side ofthe disk. It is not only desirable that the boot should be located. asin Fig. 1, wherein the rear edge of the boot is sub; stantiallyco-incident with the rear edge of the disk but it is also important thatthe boot and scraper should be properly spaced from the convex side ofthe disk, to insure the best result ,in operation. By 1oeating the bootso that the rear edge of the boot is substantially co -incident with therear edge of the disk it will be noted that the rotation of the disktends to carry obstructions away from the boot whereas if theboot waslocated forwardly or near the center of the disk, the sticky substancethat would gather on the convex face of the disk would by the rotationof the disk be brought toward the boot and in'tiine would tend toSpecification of Letters Patent.

Application filed February 17.

liatented Nov. 2d, lint.

1911. Serial lilo. 6959, 338.

It has been the usual practice to locate the boot so that it projects tosome extent beyond'the rear edge of the disk. By that is meant that therear wall of the boot will be some distance rearwardly from therear edgeof the disk. Of course in this position of the parts the disk will notcarry sticky substances so that they will impinge against the boot nearits rear edge. But in actual use these disks are adapted. to rise andfall and to that end spring pressure devices are,

employed andthey have what is often called a digging action by reason ofthis up and down movement. It is apparent that if the rear wall of theboot extends some distance beyond the rear edge of the disk, the bootwill tend to strike obstacles and projections in the ground and therebyinterfere with the up and down or digging action of the disk. It haslong been known that it would be desirable to have the boot so locatedthat its rear wall would be substantially coincident with the rear edgeor periphery of the disk, but in that position with'the disk rotatingtoward the toe of the boot there is great danger of sticky substancesbeing car ried to a' point between the inner wall of the boot and thedisk, and in order to avoid this the present improvement provides for anopen space between the rear wall of the boot and the convex "face of thedisk, while the toe scraper i bears against the face ofthe disk. Theopen space between the inner wall of the boot and the disk will permitthe sticky substances to be carried by the disk without causing them toimpinge against the wall and this open space is of tapering conformationwith its widest part above the center of the disk so that the outlet forsticky substances carried by the disk grows greater from the toeupwardly.

With these explanations in view it will be noted that in Fig. 2 the bootand scraper are so arranged in their association on the convex side ofthe disk that the extreme lowest edge of the boot bears against theconvex face, but there is shown an open space 5 extending upwardly fromsaid extreme lower edge and it will be noted that that open space tapersto a marked degree sticky dirt tends to accumulate at the lowermostpoint of the boot where the scraper is doing its scraping operation andby forming the open space of that before mentioned conformation there isa desirable outlet for all sticky substances that necessarily wedgethemselves between the face of the disk and the scraper and lowermostend of the boot and it will be noted that the movement of the disk willtend to cooperate in the arrangement of the boot and the open space tofacilitate the movement of the sticky substance upwardly and away fromthe toe of the boot, whereas a different formation of open space mightcause the 1novement of the disk to pack these sticky substances in thespace between the boot and the disk. It would therefore appear that byplacing the boot so that the rear wall is substantially co-incident withthe disk, or atv least placed at a point where the movement of the diskcan not carry the substance toward the boot, and then by so associatingthe inner wall of the boot with the convex face of the disk that themovement of the disk will carry sticky substance from the toe of theboot upwardly and freely so as to relieve the toe of the boot from anyaccumulation of sticky substance, the result will be greatly improved.

It will also be seen from the drawings that the formation of the bootand its relation to the disk is such that the open space formed betweenthe boot and disk is also wider at the forward part of the boot; i. 6.,the part indicated by 3*, is farther removed from the disk than the rearpart of the boot, indicated by 3 This construction also Inateriallytends to prevent the dirt and other substances from clogging, sinceafter the dirt has passed between the rear of the boot and the disk, theincreased space between the boot and disk will permit it to readily bedischarged at the forward part of the boot. There is therefore a taperedspace exing open space extending from said lowerend toward the center ofthe disk, and also tapering upward toward the top of said boot, and ascraper secured to said boot and extending forwardly and upwardly,substantially as specified.

2. The combination of a concavo-convex disk and drag bar with a boot andscraper secured to the toe of said boot, the boot beinglocated at therear of the disk with its rear wall substantially coincident with therear edge of the disk, the inner wall of the boot forming with theconvex side of the disk an open space tapering from the lower end of theboottoward the center of the disk and also tapering upward toward top ofsaid boot, substantially as specified.

3. In a disk furrow opener, a concavo-convex disk, a boot located at therear of the disk with its rear wall substantially coincident with therear edge of the disk, the inner wall of said boot forming with theconvex side of the disk an open space which tapers from the bottom ofthe boot toward the top thereof, and a scraper secured to the toe of theboot.

In testimony whereof, I have hereunto set my hand this 9th day ofFebruary, 1911.

WILLARD A. VAN BRUNT.

WVit-nesses:

F. H. GLAUsEN, C. H. EVERTS.

